Re: Latest recommendation for asmlib + number of LUNs
- From: "Bobak, Mark" <Mark.Bobak@xxxxxxxxxxxx>
- To: "niall.litchfield@xxxxxxxxx" <niall.litchfield@xxxxxxxxx>, Chris Stephens <Chris.Stephens@xxxxxxx>
- Date: Thu, 15 Aug 2013 15:37:09 +0000
I have to disagree with Niall's contention that ASMLib only provides those
two features.
If you commit to running UEK, there is also the T10 data protection
(DIF/DIX) that is only available via ASMLib. This provides data
checksumming from the database all the way through to the storage array.
IMHO, this is where the real value of ASMLib is, as it's providing
something that's otherwise unavailable.
-Mark
PS More info on T10 data protections and ASMLib is available here:
https://blogs.oracle.com/wim/entry/asmlib
(Search for "T10".)
On 8/15/13 6:14 AM, "Niall Litchfield" <niall.litchfield@xxxxxxxxx> wrote:
>As you say you'll encounter at least 2 different opinions. I fall into the
>"don't think its worth it" camp, so bear that in mind in what follows. We
>also use it exclusively here for our RAC systems - haven't got that
>standard rewritten as yet :)
>Technically in 11.x asmlib only provides 2 features, both of which I would
>argue are available without it.
>
>1) it provides an exclusive I/O interface to the device
>2) it labels the disk so that there is persistent naming for the device.
>
><ŠtrimmedŠ>
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